/* $NetBSD: fixunstfsi_ieee754.c,v 1.2 2012/08/05 04:28:58 matt Exp $ */ /*- * Copyright (c) 2011 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include <sys/cdefs.h> #if defined(LIBC_SCCS) && !defined(lint) __RCSID("$NetBSD: fixunstfsi_ieee754.c,v 1.2 2012/08/05 04:28:58 matt Exp $"); #endif /* LIBC_SCCS and not lint */ #include <stdbool.h> #include <stdint.h> #include <float.h> #include <machine/ieee.h> #ifdef SOFTFLOAT #include "softfloat/softfloat-for-gcc.h" #endif #if defined(__x86_64__) || defined(__i486__) #define FIXUNS __fixunsxfsi #else #define FIXUNS __fixunstfsi #endif uint32_t __fixunsgen32(int, bool, size_t, size_t, const uint32_t *); uint32_t FIXUNS(long double); /* * Convert long double to (unsigned) int. All operations are done module 2^32. */ uint32_t FIXUNS(long double x) { const union ieee_ext_u extu = { .extu_ld = x }; uint32_t frac[(EXT_FRACBITS + 31)/32 + 1]; frac[0] = 0; EXT_TO_ARRAY32(extu, &frac[1]); return __fixunsgen32( extu.extu_ext.ext_exp - EXT_EXP_BIAS, extu.extu_ext.ext_sign != 0, LDBL_MANT_DIG, EXT_FRACHBITS, &frac[__arraycount(frac)-1]); } |